Improvement in piston water meters and motors



'J. 0. DENNERT. Piston'Wafioer Meter and Motor.

No. 201,505; Patented March 19, 18 78.,

N-FEYERS, PHOTO-LITKOGRAPRER. WASHINGTONv B a UNIrEnSrAr s PATENTOFF-ICE.

JOHANN O. DENNERT, OF ALTONA, GERMANY.

i IMPROV EMENT I N ,PISTONWAITER' METERS AND MOTORS.

JSpecification forming part of LettersPatent No. 201,505, dated March19, 1878; application filed October 12, 1877.

To all whom it may concern: Y

Be. it known that I, JOHANN CHRISTIAN DENNERT, of the city of Altona,Germany, have invented certainmnew and useful lmprovements in LiquidMeters and Motors, of which the following is a description,'referencebeing had to the accompanying drawings, forming part of thisspecification.

This invention is more particularly designed to be applied to water orother liquid meters or motors in which a reciprocating piston workingwithin a stationary cylinder is used to effect the measurement of theliquid or to impart a motive force or power, as derived from thepressure of the liquid.

One part of the invention consists in certain means for changing orreversing the action of the valve which controls the motion of saidpiston, whereby a very quick and efficient valvular action is obtained.

' Another part of the invention consists in a combination, with theinlet-pipe to themeter or motor, of an automatic regulator of novelconstruction, for controlling the supply of the liquid by the pressurethereof.

Figure 1 represents a plan view of a liquid meter or motor in part, withmy invention applied; Fig. 2, a sectional side view of the sameon theline as m. Fig. 3 is an inverted view from the interior of the automaticregulator for controlling the supply of the liquid according to itspressure, and Fig. 4 a horizontal section of the same.

A is the stationary working cylinder of a reciprocating piston meter ormotor; B, its piston, and O the piston -rod. The water or other liquidis admitted to said cylinder by an inlet, b, and branch pipes 0 ctherefrom, subject to the control of a rolling valve, D, whichaccordingly as it is vibrated admits the liquid by passages d d,alternately to and exhausts it alternately from opposite ends of theworking cylinder, the exhaust fiow ultimately passing ofl by an outlet,6. The invention is not restricted, however, to any particularconstruction of the valve or of the passages which it controls. Seatedon or connected with the valve D is a transverse beam or bar, E, which,as it is rocked, gives motion to the valve D. This rocking beam or baris preferably of a flat construction on its upper sur I face, andresting freely on it is a weight, G.

Said weight is carried by and is free to move up and down within a frameor box, H, which is arranged to slide along ways I I, above the beam E,and is reciprocated along said ways with a corresponding motion to thatof the piston B, by means of a rod, L, and cross bar or piece K,connecting said rod with the pistonrod (1..

M M are trip-levers at or beyond the opposite ends of the rocking beamor bar E. These levers, which form part of the trip mechanism of thevalve, are controlled or pressed inward by springs ff, or weights may besubstituted for the springs. Each of said levers is constructed at ornear its top with a side lip or catch, 9, on which the elevated end ofthe rocking bar or beam E rests till tripped, and at a suitable distancebelow each of said lips :or catches is a rest or cushion, h, whichreceives upon it the depressed end of the beam or lever E, as the latteris rocked to change the position of the valve. These rests may be facedwith rubber to bear shock as the ends of the lever come down upon them.

In the operation of the meter or motor the valve controlling its pistonis quickly and suddenly reversed, as the working piston approaches theend ef either of its strokes, by a projection, It or k, on the slidingframe'or box H, striking that one of the levers M which holds up, by itscatch 9, the elevated end of the beam or bar E, and, so soon as saidlever is tripped or released, the weight G bearing on said end of thebeam or bar E depresses it and causes the opposite end of said beam orbar to be raised and to be secured in its raised position by its triplever M springing inward or forward. The same action takes placealternately at opposite ends of the pistons stroke.

The regulator for controlling. the supply of liquid by the pressurethereof forms an attachment to the inlet b in advance of it. Theconstruction of said regulator is substantially as follows: N is acylinder, into one end of which the water to supply the meter or motorenters, by a pipe, I. This cylinder contains a piston, O, which servesto control an aperture, m, in a branch, P, leading to the inlet b of themeter or motor. Said piston is extended backwardly through astuffing-box, n, at the reverse end of the cylinder to that with whichthe pipe lconnects, and is controlled at its protruding end by anadjustable weighted lever, Q; also, is connected by an arm or rod, R,with a cook or other suitable valve, S, in the pipe I, or between saidpipe and the cylinder N. When the water enters the regulator it pressesback the piston 0, so as toopen the aperture m, by or through which thewater passes to the inlet b of the meter or motor. v The adjustableweighted. lever Q or adjustable weight on said lever gives the necessarypressure, which the piston O is required to resist. Should the pressureof the incomin g water he in excess, the piston O is pressed furtherback, and the valve S turned to shut off or reduce the supply, thusallowing less water to pass into the meter or motor. The farther thepiston O is moved back, the more the valve S is closed, and the greateris the reduction in the amount of water entering the meter or motorwithin a given time.

I claim- 1. The combination, with the reciprocating piston of the meteror motor and valve which controls the motion of said piston, of therocking beam or bar E, the trip-levers M M,

and the sliding box or frame H, actuated by the piston and provided witha loose or free weight, G, for operation on the beam or lever E whentripped or released at the end of the pistons stroke, substantially asspecified.

2. The combination, in an automatic regulator for controlling the supplyof liquid by the pressure thereof, of the cylinder N, with its weightedpiston 0 arranged to control an aperture, m, in communication with theinlet b of the meter, the opening or pipe lthrough which the incomingliquid is admitted to said cylinder and caused to press upon one end ofthe piston therein, the rod or connection R, and the valve S, controlledby said piston, sub stantially as specified.

3. The combination of the cylinder N, havin g an aperture, m, incommunication with the inlet 1) of the meter or motor, the piston O, theweighted lever Q, the rod or connection R, and the valve S in orcontrolling the inlet to the cylinder N, substantially as and for thepurpose herein set forth.

. J. G. DENNERT.

Witnesses:

K. ARETA, T. O. SCHMIDT.

